Yet, they wanted to get clean and so what device they used was to take oil, typically olive oil, spread it on themselves, then get a scrapper, a metal scrapper, and scrap off the oil with it what was underneath the oil.

当他们想要保持清洁时,他们所使用的东西就是油,通常是橄榄油,把橄榄油抹在身上,然后拿一个刮板,金属刮板,把污垢和油一起刮下来

耶鲁公开课 - 古希腊历史简介课程节选

I computed the returns on the stocks, bonds, and oil for every year from 1983 and I computed the average returns, which I take as the expected returns, I took the standard deviations, and I took the covariance.

我计算了从1983年以来每年的股票,债券和石油的收益，从而得出平均收益率，这些平均收益率作为预期收益率，然后算得标准差及协方差。

耶鲁公开课 - 金融市场课程节选

Okay, so in oil we all know that in the late 60s, early 70s, OPEC was formed precisely to restrict quantity among the major oil producing countries, and very quickly we see companies take other countries take advantage of this to start producing oil profitably.

众所周知在上世纪六七十年代,为了限制石油的产量,主要产油国成立了OPEC组织,但是很快就有一些国家,利用这点来产油获利

耶鲁公开课 - 博弈论课程节选